<template>
	<view>
		<!-- 使用自定义的搜索组件 -->
		<!-- <my-search :bgcolor="'pink'" :radius="3"></my-search> -->
		<my-search @click="gotoSearch"></my-search>
		
		<view class="scroll-view-container">
			<!-- 左侧的滑动区域 -->
			<scroll-view class="left-scroll-view" scroll-y="true" :style="{height: wh + 'px'}" >
				<block v-for="(item,i) in cateList" :key="i">
					<view :class="['left-scroll-view-item',i === active ? 'active' : ''] " @click="activeChanged(i)">{{item.cat_name}}</view>
				</block>
			</scroll-view>
			<!-- 右侧的滑动区域 -->
			<scroll-view scroll-y="true" :style="{height: wh + 'px'}" :scroll-top="scrollTop">
				<view class="cate-lv2" v-for="(item2,i2) in cateLevel2" :key="i2">
					<!-- 二级分类的标题 -->
					<view class="cate-lv2-title">
						/ {{item2.cat_name}} /
					</view>
					<!-- 当前二级分类下的三级分类列表 -->
					<view class="cate-lv3-list">
						<view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
							<!-- 三级分类的图片 -->
							<image :src="item3.cat_icon"></image>
							<!-- 三级分类的文本 -->
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import badgeMix from '@/mixins/tabbar-badge.js'
	
	export default {
		mixins:[badgeMix],
		data() {
			return {
				//当前设备可用高度
				wh: 0,
				cateList:[],
				active:0,
				//二级分类的列表
				cateLevel2:[],
				scrollTop:0
			};
		},
		onLoad() {
			const sysInfo = uni.getSystemInfoSync()
			// console.log(sysInfo)
			this.wh = sysInfo.windowHeight -50
			this.getCateList()
		},
		methods:{
			//获取分类列表数据
			async getCateList(){
				const {data : res} =  await uni.$http.get('/api/public/v1/categories')
				if(res.meta.status !== 200) return uni.$showMsg()
				this.cateList = res.message
			
				//为二级分类赋值
				this.cateLevel2 = res.message[0].children
			  // 添加日志确认数据
			  // console.log('分类数据已加载:', this.cateList)
			  // console.log('二级分类:', this.cateLevel2)
			},
			activeChanged(i){
				this.active = i
				
				//重新为二级分类赋值
				this.cateLevel2=this.cateList[i].children
				 // console.log('二级分类:', this.cateLevel2)
				 
				 this.scrollTop = this.scrollTop ===0 ?1:0
			},
			//跳转到商品列表页面
			gotoGoodsList(item){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid=' + item.cat_id
				})
			},
			gotoSearch(){
				uni.navigateTo({
					url:'/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
	.scroll-view-container{
		display: flex;
		.left-scroll-view{
			width: 120px 
		}
		.left-scroll-view-item{
			background-color: #f7f7f7;
			line-height: 60px;
			text-align: center;
			font-size: 12px;
			
			&.active { 
				background-color: #FFFFFF;
				position: relative;
				
				&::before {
					content: '';
					display: block;
					width: 3px;
					height: 30px;
					background-color: #F21010;
					position: absolute;
					top: 50%;
					left: 0;
					transform: translateY(-50%);
				}
			}
		}
		.cate-lv2-title{
			font-size: 12px;
			font-weight: bold;
			text-align: center;
			padding: 15px 0;
		}
		.cate-lv3-list{
			display: flex;
			flex-wrap: wrap;
			.cate-lv3-item{
				width: 33.33%;
				display: flex;
				flex-direction: column;
				justify-content: center;
				align-items: center;
				margin-bottom: 10px;
				image{
					width: 60px;
					height: 60px;
				}
				text{
					font-size: 12px;
				}
			}
		}
	}
</style>
